Apparatus for reducing temperature of superheated steam.



M. v v. SEWALL.

APPARATUS FOR REDUCING TEMPERATURE 0F SUPBRHEATED STEAM.

APPLIoATIox FILED nn.2s,19oe.

2 SHEETS-SHEET 1.

- witnesses PATENTED OCT. 30, 1906.

PATENTBD 001130, 190e.l

l M. W. SEWALL. APPARATUSFU'R REDUCING TEMPERATURE 0F SUPBRHBTBD STEAM.

APPLIUATIQN FILED HAR. 28. 1906.

2 SHEETS-SHEET 2.

wlw ma M Wm $513 llolcl z% div-Aki 'y ss dUNITED STATES PATENT OFFICE.v l

MINOTT W.' SEVVALL, OF ROSELLE, NEW JERSEY.

APPARATUS FOR REDUCING TEMPERATURE 0F SUPERHEATED STEAM.

Specification of Letters Patent.

Patented oct. so, 190e.l

Application filed March 28, 1906. Serial No. 308,385-

To aZZ whom t may concern.- Y

Beit known that I, MINo'r'r W. SEWALL, a citizen of the United States, residing at Roselle, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Apparatus for Reducing the Tem erature of Superheated Steam, of which tlie following is a specification, reference being had therein to the accomWpkanying drawings.

ere steam from a single source or place of generation is sup lied to a number of different pieces of machinery or apparatus, it is frequently desirable that the temperature of the steam should be different at the different places of delivery.

The purpose of this invention is to effect an automatic reduction of the temperature of highly-superheated steam which is supplied from the superheaters or the steam-mam of a plant, so that steam of a lower degree of temperature may be available where this is necessary or desirable.

In the accompanying drawings -I have illustrated two forms of apparatus embodying my invention and designated, respectively, Figure 1 and Fig. 2, these being sectional views with parts in elevation, illustrating sufficient apparatus for a clear understanding ofthe principle of my invention.

Referring to the drawings, A represents a steam plant, which may be of any usual or approved construction, that illustrated comprising a water-tube boiler a and a steam dome or drum a,-withlother accessory parts,

which it is unnecessary to refer to in detail.

B represents as a whole a vcooler of the surface-condenser type. This cooler is formed with the end chambers b b, connected by the pipes b2, these parts being adapted to contaln water. There is between the end chambers b an intermediate space b', traversed by the water-tubes b2, and through this space b the steam whose temperature is to be reduced is caused to pass.

Referring now articularly to the apparatus illustrated in IEig. 1, C represents a pipe Aconnecting the water-space of the steamgenerator A withA the waterpspace of the cooler B. In this pipe there is placed a stopvalve' c. D represents a pipe connecting the steam-space of the generator with the steam-space of the cooler, and in this pipe there is situated a stop-valve'd. It will be `the boiler.

observed that the cooler is' situated below the normal minimum or low-water level of the boiler or steam-generator, so that when in use the cooler is always flooded with water from the boiler the temperature of which will. be approximately that of the water in The two end chambers b b of the cooler are united not only by the water-tubes b2, butalso by a connection or conduit comprising a circulatingipe f and an enlargement or separating-c amber F, which latter isconnected at f withthe ipe E, through which the steam is conducte away from t e cooler to the place of use. The separatingchamber F is situated above the cooler and preferably at such level that it will be partly filled with water, the water of course standing in the chamber F at the same level as it does in the drum a. Suitable provision is made, as the dam to prevent the water flowing from the chamber F into the steampipe E. G is a draw-off pipe connected with the'water-space of the cooler and provided 'with a suitable stop-valve g.

With this description of the apparatus its operation may be stated. The valve c in the water-pipe C being opened, the Waterspace of the cooler will be flooded with water from the boiler, and the temperature of the cooler will be approximately that of the water within the boiler. If now the valve d be opened, superheated steam from the drum a will pass into the steam-space of the cooler and out through the pipe E. On account of the excess of the temperature ofthe steam overthat of the water in the cooler evaporation will take place on the water side and from the surface exposed in the chamber l", such evaporation resultingin a lowering of the temperature of the cooler, and conseqliiently Vof the steam which may pass theret rough. Byr eason of the connection of the evaporating-chamber F with the pipe E the steam that is given off from the surface IOO i it is necessary to first draw off through the pipe G the cold Water that might be standing therein, allowing the cooler to fill with water from the boiler until it attains the desired temperature, which will of course be that incident to the pressure maintained in the generator'A.

The apparatus I have just described is the greferred form of my invention. In Fig. 2 I ave shown a different embodiment, which I will now describe. Here the steam-generator A is similar to that shown in Fig. 1. The cooler differs in this, however, that the end water-spaces are united only by means of the water-tubes v2, the pipef being entirely omitted. The steam-space b of the cooler is connected by the pipe D with the generator, as in Fig. 1. The water-pipe C is provided with a float-valve c, arran ed to maintain within the water-space of t e cooler a con-l stant water-level, this being sufIiciently below the top of the cooler to afford an ample evaporating-space. The water-pipe C may and usually will connect with the waterspace of the steam-generator A, as represented in Fig. 1,. although this is not essential, as the water for the cooler can be taken from another source. The advantages, however, of taking the Water from the same source as that of the steam-supply delivered through the pipe D will of coursebe apparent. The space above the water-level maintained within the cooler is connected with the steampi e E by a pipe connection f2, through W 'ch the steam or vapor that rises from the surface of the water is conducted into the steam-pipe E, the pipe f2 being connected with the upper portion of one of the waterheads b.

It will be understood that in this formof my invention the water-level is maintained through the action of the valve device c instead of by ravity, as in Fig. 1 construction.

The princip e of operation of the apparatus (shown in Fig. 2) can be understood without further explanation.

It will be a parent from the foregoing description, talgen in connection with the drawings, that my invention is not limited to a specific apparatus. I, however, do not herein deem it necessary to illustrate and describe further modifications or variations from what is shown, it being understood that the principle of the invention is capable of embodiment in a variety of forms or apparatus.

What I claim is-- 1. The combination of a steam-generator and superheater, a cooler having a waterspace and a steam-space, a steam connection between the superheater of the steam-generator and the steam-space of the cooler, means for 'maintaining water within the cooler, a steam-pipe E leading away from the cooler, and a connection F between the water portion of the cooler, above the water-level and the said steam-pipe E, substantially as set forth.

2. The combination of a statin-generator and superheater, a cooler comprising a waterspace and a steam-space, a water connection between the steam-generator and the waterspace of the cooler, a steam connection between the superheater of the generator and the steam-space of the cooler, a steam-pipe E leading away from the cooler, and a connection between the .water-space of the cooler, above the water-level, and the said pipi` E, substantially as set forth.

3. T he combination of a steam-generator and super-heater, a cooler having a waterspace and a steam-space, means for maintaining water at a desired level within the water-space of the cooler, a separating chamber or space above the water-level ofthe waters ace of the cooler, a steam-pipe connecting t e superheater with the steam-space of the cooler, a steam-pipe E leading away from the steam-space of the cooler, and a pipe or conduit uniting the evaporating chamber or space with the said pipe E, substantially as set forth.

4. The combination of a steam-generator and superheater, a cooler of the surface-condenser type having `a water-space and a steam-space, and formed with an evaporating chamber or space above the level of the water in the water-space, means for supplying the water-space of the cooler with water from the steam-generator, a steam connection between the superheater and. the steamspace of the cooler, a steam-pipe E leading away from the cooler, and a connection between the evaporating space or chamber of the cooler and the said pipe E,substantially as set forth.

5. The combination of a steam-generator and superheater, a cooler B having a Waterspace and a steam-space, a connection bctween the water-space of the generator and the water-space of the cooler', a connection between the superheater and the steam-space of the cooler, a steam-pipe E leading away from the cooler, a separating-chamber F havlOO IIO

ing circulating connections with the Water- In testimony whereof I affix my signature space of the cooler, this lrlzhmnller being lsitu in presence of two witnesses.

ated at such height t at t e Watereve therein will correspond with the Water-level MINOTT W SEWALL' 5 in the steam-generator, and a. connection be- Witnesses:

tween the chamber -F and the pipe E, sub- AUGUSTE G. Prwrr,

stantielly as set forth. j H. S. CHINNOQK, Jr. 

